Defining Red Drop Profile

The Red Drop Profiles page allows you to define random early detection (RED) drop profiles.

To configure a Red Drop Profile using the J-Web interface:

  1. Select Configure > Class of Service > Drop Profiles.

    Note: After you make changes to the configuration in this window, you must commit the changes immediately for them to take effect. To commit all changes to the active configuration, select Commit Options > Commit. See Using the Commit Options to Commit Configuration Changes (J-Web Procedure) for details about all commit options.

  2. Click one of the following:
    • Add—To add a drop profile. Enter information into the Drop Profile page, as described in Table 36.
    • Edit—To edit a drop profile. Enter information into the Drop Profile page, as described in Table 36.
    • Delete—To delete an existing drop profile.

Table 36: RED Drop Profiles Configuration Page Summary



Your Action

RED Drop Profiles Summary

Drop profile name

Specifies a name for the drop profile.

A drop profile consists of pairs of values between 0 and 100, one for queue buffer fill level and one for drop probability, that determines the relationship between a buffer's fullness and the likelihood it will drop packets. The values you assign to each pair must increase relative to the previous pair of values. With a few value pairs the system automatically constructs a drop profile.

To name a drop profile, type the name; for example, be-normal.

Profile type

Specifies whether a RED drop profile type is interpolated or segmented.

For more information about segmented and interpolated drop profiles, see the Junos Class of Service Configuration.

To specify a RED drop profile type, select one of the following:

  • Interpolated—The value pairs are interpolated to produce a smooth profile.
  • Segmented—The value pairs are represented by line fragments, which connect each data point on the graph to produce a segmented profile.

Data points

Specifies the points for generating the RED drop profile graph. Each data point is defined by a pair of x and y coordinates and represents the relationship between them.

The x axis represents the queue buffer fill level, which is a percentage value of how full the queue is. A value of 100 means the queue is full.

The y axis represents the drop probability, which is a percentage value of the chances of a packet being dropped. A value of 0 means that a packet is never dropped, and a value of 100 means that all packets are dropped.

To add the specified queue buffer fill level and drop probability as a data point for the graph click Add.

To specify x and y coordinates for data points, type a number between 0 and 100 in the following boxes:

  • Fill level—Type the percentage value of queue buffer fullness for the x coordinate; for example, 95.
  • Drop Probability—Type the percentage value of drop probability for the y coordinate; for example, 85.

To edit a data point, select it and click Edit.

To remove a data point, select it and click Delete.